Polyimpulse gas-engine.



L. C. REED.

POLYlMPULLSE GAS ENGINE.

' APPLICATIONYFILED JUNE 11. 1915.

' Patented Oct. 3,1916.

4 SHEETS-SHEET I.

' all L. C. REED.

POLYIMPULSE G'ASENGINE;

I APPLICATION FILED JUNE 17, 1915- 1 ,200, 1 3 3 Patented Oct; 3, 1916 4SHEETS-SHEET 2.

L. C. REED.

POLYIMPULSE GAS ENG INE. APPLICATION FILED JUNE11 19 15.

mamas.

4 SHEETS-S H EET .3.

Patented 0%. 3,1916.

L. C. REED.

POLYIMPULSE GAS ENGINE.

APPLICATION FlLED JUNE 17. 1915.

Patented Oct. 3, 1916.

' 4 SHEETS-SHEET 4 UNITED STATES PATENT OFFICE.

LYMAN C. REED, OF NEW ORLEANS, LOUISIANA, ASSIGNOR OF TWENTY-FOUR ONE-HUNDREDTHS TO EUGENE A. PHARR, OF THE PARISH OF ST. MARY, LOUISIANA, ANDTWENTY-FOUR ONE-HUNDREDTHS T0 WARREN B. REED, TEN ONE-HUN- 4 DREDTHS TOROBERT E. MILLING, AND FORTY-TWO ON E-HUNDREDTHS TO CHARLES M. ESPY, ALLOF THE PARISH OF ORLEANS, LOUISIANA.

IOLYIMPULSE GAS-ENGINE.

Specification of Letters Patent.

Patented Oct. 3, 1916.

exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same. a

This invention relates to a combined reciprocating and rotary gasengine, and has for its purpose to provide an engine of this characterthat will be more simple and less costly in construction, and moreefficient and certain in action than has been heretofore proposed. I

\Vith these and other objects in View, the invention consists in thenovel details of construction and combinations of parts more fullyhereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of thisspecification in which like numerals designate like'parts in all theviews: Figure l is a sectional view taken on the line 11 of Fig. 2 of anengine made in accordance with the invention, and looking in thedirection of the arrows: Fig. 2 is a sectional view taken on the line 22of Fig. 1, looking in the direction of the arrows; Fig. 3 is a partlysectional view taken on the line 33 of Fig. 1, looking in the directionof the arrows; Fig. 4 is a sectional detail view taken on the line 4% ofFig. 1, looking in the direction of the arrows; Fig. 5 is a sectionaldetail view taken on the line 55 of Fig. 1, looking in the direction ofthe arrows; Fig. 6 is a sectional detail view showing a slightlymodified form of the invention; Fig. 7 is a view taken on the line 77 ofFig. 6; and Fig; 8 is a View taken onthe line 88 of Fig. 6.

1 indicates the rotor spider, 2 the stator inside of which the rotorrevolves; 300, 301, 302, 303, 304 and 305, etc., the gas pockets in therotor rim 3 and their positions at certain periods of the cycle; 4indicates inserted slidable metal pieces with which the gas pockets arelined, and which act as gas I means for keeping the same normallyv inthe position shown.

8' represents a pipe leading to the carbureter -or other supply, 9 acheck valve controlling the admission of fuel into the space 10 abovethe piston 5, and 11 another check valve controlling the passage betweenthe said space 10, and the chamber 12. Leading into the chamber 12 is apipe 13 provided with a check valve 14, and which communicates with acompressed gas tank not .shown.

15 represents a pipe provided with a valve not shown, leading from saidcompressed gas tank to the chamber 12.- As best shown in Fig. 2, a space16 is provided immediately below the piston head 6, and which spacecommunicates through the passage 17 with the chamber 18 in which islocated the sparking device 19 as will be readily understood.

So far as now disclosed, should a gaseousfuel mixture under sufficientpressure be delivered into the chamber 12, through the pipe 15, it willfill said chamber and the gas pocket-in the position 300, and will turnthe rotor 1 until the said pocket moves from the position 300 to theposition 301, when the compressed fuel contained in said pocket willenter the space 16 and pas- ,sage 17, reach the plug or sparking device19, become ignited, and an explosion will result. The force of theexplosion will lift the piston head 6, which will cause a com: pressionof any gaseous fuel which may already have entered the chamber 10', andthis compression will close the check valve 9, open the check valve 11,and will force an additional quantity of compressed gas into the chamber12. The gaseous mixture thus forced into the chamber 12 will act toimpart an impulse to the particular gas pocket that then occupies theposition 300, and to thus aidin rotating the rim 3. The force of theexplosion will further impel the gas pocket in the position 301, acertain distance around the axis of the rotor, and when said. lastnamed. pocket reaches the position 302, its contained compressed gaswill react against the stator 2, enter the passage 20 and exhaustthrough the passage 21 in the space 27 inside the rotor rim 3. In themeantime, the piston head 6 will have moved upwardly sufiiciently topermit the space in the cylinder 7 below said piston head to communicatewith the passage 22, and thereby permit the hot gas between said pistonhead 6 and said rotor rim 3, to be exhausted through said passage 22into the gas pocket which occupies the position 303 in Fig. 1. Theexhaust gas from the cylinder 7 thus entering the last named gas pocketwill react against the stator 2 to further impart an impulse to therotor rim WVhen the gas in the last named pocket reaches the position30-1, in Fig. 1, the exhaust gas under pressure will further reactagainst the rotor 2, enter the passage 25, and exhaust through thepassage 26 into the space 27. It will thus be seen that a singleexplosion will cause an impulse to be exerted on the pocket occupyingthe position 300, it'will exert an impulse on'the pocket occupying theposi-' tion 301, that the highly heated and compressed gas will exert animpulse on the pocket occupying the position 302 on the pocket occupyingthe position 303, and on the pocket occupying the position 304:.

The spring 8 returns the piston to the position shown in Fig. 1, and asthe movement of each gas pocket after each explosion is greater than thetotal movement of the piston 5, the piston head 6 will have returned toits normal position before another explosion takes place. The return ofthe piston head 6 is aided by gravity, the stored energy in the spring8, as well as the expansive force of the compressed gas in the space 10.The valve 11 immediately closes as the piston begins to return or whenthe pressure in the space 10 becomes less than that in the chamber 12,and a fresh charge of gas is drawn in through the valve 9.

In the downward stroke of the piston head 6, there would be a tendencyto compress whatever residue of gas that might be left below the pistonhead 6, but the exhaust passages such as 21 and 26 in the rotor rim 3,are so spaced as to register under the space or opening 16 at the timethis compression would take place, and therefore any such residue isreadily exhausted into.

the space 27 with which the rotor rim 3 is provided. This feature of theinvention allows the piston 5 to return rapidly to its lower position intime for the preceding gas pocket to register withv opening 16, and torepeat the above operation. The said openings such as 21 and 26 withwhich each gas pocket is associated, are so designed as to give agreater or less turning movement to the rotor rim due to the force ofthe exhaust. It will here be observed that two important advantagesresult from this mode of operation: (a) All dead gases are eliminated,and (b) they do not mix with the next firing charge. A third additionaladvantage resides in the fact that (c) all valves are outside of and aretherefore protected from the fired gases. In other words, the valves arecalled on to handle only clean gas and therefore are not subject to acarbon deposit. This feature is of considerable importance in that itenables a very high efliciency to be attained, and it insures acertainty of action or acon'stant working condition which is not presentin those engines that permit a deposit of carbon upon their controllingvalves. If there are eight gas pockets in the rotor as shown, thissingle cylinder engine will develop not only the forty impulsesdisclosed above but at least sixteen additional ones making at least 56impulses in all for each rotation. That is to say the engine willdevelop 8 primary impulses due to the primary explosions of the gas i nthe pockets as they each occupy the position 301. It will develop 16secondary impulses due to the pockets, as they successively occupy thepositions 302, and 303. It w1ll develop 8 more impulses as each passagesuch as 21 registers with the exhaust passage 22, and receives theexhaust from sald last named passage after its upper end has been closedby piston '5. It will develop 8 more impulses as the pockets in the position 304 discharge their gas through the passages 25'and 26, and it willdevelop 8 more impulses due to the compressed gas from the chamber 12entering the pockets in the position 300, thus making 48 impulses. Inaddition to this, the exhaust of the gases from the space 16 through thevarious passages such as 81, 82, 83, 84, 85, 26 and 21, will add 8 moreimpulses, making a total of 56 in all, for each revolution. Of course ths number may be increased, if we count minor impulses such as thosetaking place when pocket 302 registers with the lower end of passage 20,and exhausts back through said passage 20 and rotor passage 21, ordecreased according to the design of the motor, for it is obvious thatby increasing the diameter of the rotor as many cylinders 7 can bedistributed around the periphcry of the stator as the design will allow,and of course the number of primary and secondary impulses perrevolution will be increased in like proportion. It is also obvious thatseveral units may be connected on one shaft in tandem to increase thepower, or both of the above plans may be employed .in combination to getany units of horse power required. Of course, many variations may bemade in the dimensions of the explosion pockets, and of the explosioncylinder.

A simple method of lubricating the whole engine is provided by the oilcup 30, connected by the nipple 31 to the carbureter lead pipe 8'. Theoil is thus drawn into the cylinder 7 and lubricates it, while any ex-.

cess of oil is discharged intofthe chamber 12, from where it is blowninto the pockets at the position 300 and onto the rotor rim 3,thuslubricating the surface between the said rotor rim and the stator 2.Of course, the oiling system can be augmented by several other means,but the above is found to be sufficient inpractice. Any excess of gasthat may enter the chamber 12 is at once forced through the pipe 13, andpast the check valve 14 into the compressed gas tank not shown. I preferto provide the said compressed gas tank with the ordinary air valve andpet cock, so it can be primed with gasolene, and charged with compressedair from any suitable outside supply or air pump, not shown.

Cooling water is provided for 1n the spaces 40, 41, 42, 43, and 44. Thepipe serves to' introduce said Water into the system, and the pipe 46serves to discharge the same. The circulation of this water may beeffected by a pump not shown, or by any other suitable means. 'When thepiston -5 is in its lowest position, the water from the space 41 flowsthrough the opening 47 and passage 48 out of the opening 49 into thespace 42, thus cooling the piston head-6. The piston head is furtherprovided with an opening 50 to discharge a portion of the water from thepassage 48 into the exhaust passage The hot gases later discharged intoopening 22, converts this water into high pressure steam, and increasesthe ima pulse to the rotor when discharged at 303.

The supply from the circulation system furnishes the water thusconsumed.- The heat that would otherwise be-lost by radiation is thuspartially utilized to convert this water into steam and this accordinglyadds to the efficiency of the motor not only due to the increased volumeof gas thus produced, but also to the increased momentum of the mass ofthe gas impinging upon the pockets at the position 303. Of course, whereit is not desired to thus consume cooling water the hole 50 may beplugged up. The supply of gas from the carbureter through the pipe 8' isconveniently controlled by a valve not shown. The plugs 55,, 56 and 57are readilyremovable and thus allow the valves to be taken out, andadjusted when it becomes necessary. The entire hood 60 is detachablefrom the stator 2 upon removing the fastening means 61, so

that the piston 5 may be readily removed and repaired. The saidpiston isprovided with the usual packing rings 63 and (S4 and it is convenientlyhollowed out as shown at 66 in order to reduce its weight. Should anywater accidentally find its way into the passage 22, it does no harm andreally acts as a cooling agent.

In Fig. 2 extension '70 of the stator accommodates the 'end casings 71and 72 through which the shaft 73 of the rotor is supported. The rotoris keyed to shaft 73 by means of key 74 or by any other suitable means.Rings 75y=md 76 form the ends of the gas pockets-300, etc., and furnishsupports for the slidable members,-4, forming the side Walls of saidpockets. The upper ends of the gas pockets are formedby movable gaschecks 77 which due to centrifugal force make a rubbing joint withstator 2, as will be clear from Figs. 1 and 2. When the explosion in thegas pockets takes place, these gas checks are forced against the stator2 and prevent leakage of gases from the sides of said pockets. Shouldthese gas checks, however, fail for any .reason to operate efliciently,the segmental rings 79 effectually prevent the leakage getting past therotor. The segmental rings 79 are further shown inFigs. 4 and 5. Whenthe rotor revolves, these rings fly out into the groove provided in, thestator which is not haust passages 81, 82, 83, '84, 85, 26, 21,

etc., see Fig. 4, so that leakage through said passages before firingdoes not occur- But any leakage in the spaces between the gas pockets isdischarged through said passages and therefore no back firing can occur.The rotor is made to fit the stator 2 with a very small clearance, andany Wear that occurs is compensated for by the slidable gas checks, sothe motor is kept tight.

The ignition system is simple, as shown, no timer is necessary and thespark from the plug 87 is maintained continuously from any suitablesource of current supply over wire 86.- A fan device 88 is attached toone side of rotor Fig. 2, and may form a continuation ofone of the outerrotor members 90. The various exhausts through passages 81, 82, etc.,are sucked out into space 27, Fig. 1, and discharged by fan members 88into pipe 92, while fresh air is drawn through passage 93 in statorextension .70 and through passages 82-, 83, etc., in the &

rotor. This furnishes a means of cooling the rotor, and also purges thegas pockets of their burnt gas. Both end housings carrying the bearings94 are tight so as to ing at five points, per revolution, as shown,

a large per cent. of the power in the exhaust gases is utilized and amotor of high efficiency obtained.

Coming now to the slightly modified form of the invention illustrated inFigs. 6, 7 and 8, the construction is the same as in the foregoingfigures and description, except a slide valve 100 is placed in the inlet80, between the chamber 12and gas pockets 300, all as will be clear froma comparison of Figs. 1 and 6. This slide valve is provided for thepurpose ofincreasing the e'lficiency of the engine when the parts becomeworn through excessive use, and operates in such manner as to let gasfrom chamber 12 into the rotor pockets, but it closes when said pocketsare out of register withthe opening 80, as will nowbe made clear. 101,Fig. 8, shows a bridge across the opening, and grids 102, are equallyspaced so that passages 103 will register with valve openings 104, whenthe 351valve 100 is open, and be closed by valve grids 105, when thevalve is closed. The shifting of valve plate 100 into its open andclosed positions is accomplished by projections 105 and 106, and 107fastened to the 20' rotor members 90 and so spaced as to open and closethe valve at the proper intervals. That is to say, the valve plate 100extends beyond the rotor members 90, and is provided with the roundedcorners 108 and 109, see Fig. 7, which at times lie in the paths of theprojections 105, and 106, and the projections 107 respectively. When theprojection 105 strikes the corner 108, the plate 100 is thrown into theposition shown in Fig. 7 and into the path of projection 107, thus, wewill suppose, closing the passages 103. But an instant later theprojection 107 strikes the corner 109, and forces the plate 100 in theopposite direction and thus opens said passages 103. An instant stilllater, the projection 106 strikes the corner 108 and restores the plate100 to its position shown in Fig. 7. It thusresults from theconstruction shown, that the valve plate 100 receives reciprocatingimpulses, causing it to open the passages 103 only when the gas pockets300, etc., register with the chamber 12, and causing it to close'saidpassages 103 at all other times, the parts of course being properlytimed to accomplish this result.

With the reciprocating valve just disclosed, any leakage, due to wear,of gas from chamber 12, when the gas pockets are .out of register withsaid chamber is efsion of gaseous fuel under pressure fromthe pipe 15into the chamber 12 and into the pocket 300 causes the motor to be selfstarting and for the following reasons :Supposing the pocket 300 to befilled with air at atmospheric pressure, to be moving toward the opening80 in a clockwise direction, and that the parts are so proportioned thatthe port 80 is restricted while the pocket 300 is very deep-relative toits width, when communication is established between the chamber 12 andpocket 300, theinitial admission of fuel under a high pressure into saidpocket will act as a blow to increase the speed of rotation of saidpocket and said initial admission will continue to so act, until thepressures. in said pocket and said chamber are equalized. Further, afterthe said pressures are thus equalized and the said pocket reaches theposition 301, the said compressed fuel will be ignited first on its toplayers; and progressively burn down toward the bottom of said pocket.The port 16 being sufficiently restricted, the gases thus produced andexpanded will stream through said port 16, lift the piston 6, and becomemore expanded in the cylinder 7. The reaction of the continued stream offlaming gases through said restricted port 16 may be likened to thereaction of the gases emitted by a rocket, and its effect will be tostill further speed up the rotor. This turning action on the rotor isfurther insured and enhanced by the fact that .the piston risessufficiently to permit the said gases to escape through the passage 22.

I regard the above as important features of the invention, but ofcourse,in addition, the gases further react on and through the chambers andpassages of, the rotor and stator in the manners above disclosed.

It is obvious that those skilled in the art may vary the details ofconstruction, as 'well as the; arrangement of parts without departingfrom the spirit of my invention, and therefore. I do not wish to belimited to the above disclosure except as may be required by the claims.1

What I claim is 1. In a .gas engine the combination of a rotor providedwith gas holding pockets; means adapted to fill said pockets with anexplosive mixture; acylinder provided with a piston with. which saidpockets are adapted to register; a conduit between said means and saidcylinder; and means to explode said mixture in said pockets when saidregistration takes place, substantially as described.

2. In a gas engine the combination of a rotor provided with gas holdingpockets; means comprising a chamber adapted to fill said pockets with anexplosive mixture; a cylinder provided with a piston with which saidpockets are adapted to register; connections comprising a conduitbetween said chamber and said cylinder; and means connected with saidcylinder adapted to explode said mixture in said pockets when saidregistration takes place, substantially as described.

3. In .a gas engine the combination of a rotor provided with gas holdingpockets; a cylinder with which said pockets are adapted to successivelyregister; a chamber adapted to communicate With said cylinder and tosupply said pockets with an explosive mixture; means for supplying anexplosive mixture to said cylinder; a piston in said cylinder'betweensaid pockets and said last named means; and means for exploding themixture in said pockets when said registration occurs, substantially asdescribed.

4. In av gas engine the combination of a rotor provided with gas holdingpockets; a cylinder with which said pockets are adapted to successivelyregister; a chamber adapted to communicate with said cylinder and tosupply said pockets with an explosive mixture; a valve controlling thecommunication between said chamber and saidcylinder; means for supplyingan explosive mixture to said cylinder; a valve controlling the supply ofsaid mixture from said means to said cylinder; a spring pressed pistonin said cylinder between said pockets and said last named means; andmeans for exploding the mixture in said pockets when said registrationoccurs, substantially as described.

5. In a gas engine the combination of means for supplying an explosivemixture;

a cylinder for receiving said mixture; a valve for controlling theadmission of said mixture to said cylinder; a chamber com-.

municating with said cylinder adapted to receive sa1d mixture; a valvecontrolling the communication between said cylinder and said chamber; .arotor carrying a plurality of pockets adapted to successively registerwith said chamber to be charged and then to register with said cylinderto have their charges exploded; and .a reciprocating piston insaidcylinder between said pockets and said valves whereby the latter areprotected from the action of burning gases and from deposits of carbonthereon, substantially as described.

6. In a gas engine the combination of a rotor provided with a pluralityof pockets; means for successively charging said pockets with fuel; acylinder successively communiin said cylinder; an ignition means adaptedto' successively communicate with each pocket and explode the chargetherein, thereby giving successive impulses to said rotor; and meansassociated with said cylinder and piston for absorbing a portion of theenergy of each explosion and later imparting it to said rotor,substantially as described.

7. In a, gas engine the combination of a rotor provided with a pluralityof pockets; means for successively charging said pockets with fuel; acylinder successively communicating with said charged pockets; a pistonin said cylinder; an ignition means adapted to successively communicatewith each pocket and explode the charge therein, thereby givingsuccessive impulses to said rotor; and means comprising a compressiblespring and a gas holding chamber associated with said cylinder andpiston for absorbing a portion of the energy of each explosion and laterimparting it to'said rotor, substantially as described.

8. In a gas engine the combination of a rotor provided with pockets;means for exploding successive charges of gases in said pockets andgiving successive impulses to said rotor; means permitting each explodedcharge to further expand after its initial impulse to add an additionalimpulse to said rotor; areciprocating piston adapted to receive theimpact from said exploded charges and means associated with said pistonfor absorbing a portion ofv the energy of each explosion and impartingit to said rotor, substantially as described.

9. In a gas engine the combination of a cylinder; a reciprocating pistonin said cylinder; means to supply gaseous fuel to one side of saidpiston; a chamber for holding said fuel under compression communicatingwith said side of said piston; a rotor provided with a plurality of gasholding pockets adapted to successively communicate with said chamberand then with said cylinder on the other side of said piston; means forexploding the gas in each pocket as it communicates with said cylinder;and means for permitting the exploded gas to further expand and toimpart an additional impulse cating with said charged pockets; a' pistonas it communicates with said cylinder; means for permitting the explodedgas to further expand and to impart an additional impulse to said rotor;and means permitting said piston to compress the unexploded gas in saidchamber after each explosion and to thereby impart an additional impulseto said rotor; substantially as described.

11. In a gas engine the combination of a rotor; a plurality of gaspockets and exhaust passages carried by said rotor; means to supply saidpockets with an explosive fuel; a cylinder with which said pockets andpassages are adapted to successively register; a reciprocating piston insaid cylinder adapted to receive the force of each explosion in saidpockets; a stator; a plurality of passages for the exploded gases insaid stator adapted to successively register with each gas pocket; andmeans for exploding the fuel in each gas pocket when it registers withsaid cylinder, substantially as described.

12. In a gas engine the combination of a rotor; a plurality of gaspockets and exhaust passages carried by said rotor; means comprising achamber holding gas under pressure to supply said pockets with anexplosive fuel; a cylinder with which said pockets and passages areadapted to successively register; a connection between said cylinder andsaid chamber; a reciprocating piston in said cylinder adapted to receivethe force of each explosion in said pockets and to compress the gas insaid chamber; a stator; a plurality of passages for the exploded gasesin said stator adapted to successively register with each gas pocket; anadditional passage in said stator communicating with said cylinder andsuccessively with each gas pocket; and means for exploding the fuel ineach gas pocket when it registers with said cylinder whereby a primaryimpulse due to the explosion is accompanied and followed by a pluralityof other impulses from the burnt gases produced by previous explosions,substantially as described.

13. In a gas engine the combination of a rotor provided with apluralityof pockets; means comprising a chamber and a connection provided with a,valve for successively charging said pockets with fuel; a cylindersuccessively communicating with said charged pockets; a piston in saidcylinder; and ignition means adapted to successively communicate witheach pocket and explode the charge therein thereby giving successiveimpulses to said rotor; a connection between said chamber and cylinder;and-automatic means for operating said valve, substantially asdescribed.

141. In a gas engine the combination of a rotor provided with aplurality of gas pockets; a chamber for holding gases under pressureconnected to said pockets; a valve controlling the admission of gas fromsaid chamber to said pockets; a cylinder with which said pocketsregister; means for exploding the gases in said pockets when saidregistration takes place; a piston in said cylinder receiving the forceof the explosions; means enabling said piston and cylinder to supplycompressed gas to said chamber; and automatic means for operating saidvalve in synchronism with the movements' of said piston, substantiallyas described.

15. In a gas engine the combination of a cylinder; a reciprocatingpiston in said cylinder; a rotor provided with a plurality of gaspockets adapted to successively register with said cylinder; exhaustpassages between each pair of pockets also adapted to register with saidcylinder; and suction means adapted to draw burnt gases through saidpassages, substantially as described.

16. In a gas engine the combination of a cylinder; a reciprocatingpiston in said cylinder; a rotor provided with a plurality of gaspockets adapted to successively register with said cylinder; means toexplode gases carried by said pockets when said registration takesplace; exhaust passages between each pair of pockets also adapted toregister with said cylinder; and suction means carried by said rotoradapted to draw burnt gases through said passages, substantially asdescribed.

17. 'In a gas engine the combination of a cylinder; a reciprocatingpiston in said cylinder; a rotor provided with a plurality of gaspockets adapted to successively register with said cylinder; exhaustpassages between each pair of pockets also adapted to register with saidcylinder; a stator; a

plurality of exhaust passages carried by said stator with which said gaspockets and exhaust passages are adapted to successively register; andsuction means adapted to draw burnt gases through said passages,

substantially as described.

18. In a gas engine the combination of a rotor provided with a pluralityof pockets;

a chamber for holding fuel under pressure provided with a passage withWhlCh said pockets are adapted to successively register; a slide valvecontrolling said passage; automatic means for operating said valve; apiston and cylinder with which said pockets are adapted to successivelyregister; an ignition means adapted to explode successive charges offuel in said pockets when said registration takes place; and a valvedconnection between said cylinder and said chamber, substantially asdescribed.

19. In a gas enginethe combination of a .rotor having gas pocketsadapted to receive explosive impulses; and a reciprocating piston andconnections adapted to impart additional impulses to said rotor throughunexploded compressed gases, substantially as described.

20. In a gas engine the combination of a rotor having gas pockets; and areciprocating spring pressed piston adapted to be moved in one directionby gases exploded in said pockets, and in the other direction by springpressure and by the pressure due to compressed unexploded gases,substantially as described.

21. In a gas engine the combination of a rotor provided with gaspockets; a gas chamber adapted to admit gas into said pockets to startthe motor; a piston with which said pockets successively register; meansto explode the gas in said pockets when said registration takes place;and means by which said piston replenishes the gas in said chamber uponeach explosion, substantially as described.

22. In agas engine the combination of a rotor; a stator; a plurality ofgas pockets in said rotor; a pair of rings constituting the ends of eachof said pockets; packing members located in each pocket between theouter circumference of said rings and said stator; and additionalmovable packing members located outside of said first named packingmembers adapted to seal the joint between the latter and said stator,substantially as described.

23. In a gas engine the combination of a rotor having explosive pockets;a stator provided with a cooling system; and a .piston adapted toreceive the explosions from said pockets and having a passage connectingwith said system; substantially as described.

24. In a gasengine the combination of a the explosions from saidpockets; a gas intake communicating with said cylinder; and means toadmit oil into said intake, substantially as described.

26. In a gas engine the combination of a stator provided with exhaustpassages for the exploded fuel, and also with air passages to admitcooling air to the parts; a rotor provided with gas pockets and exhaustpassages each .adapted to register with said first named exhaustpassages; said rotor being also provided with fan members and a spacewith which'isaid exhaust passage carried by the rotor and said air,passages carried by said stator register, whereby cooling air may besucked into said space and at the same time purge said pockets of burntgases; and means for permitting said air to leave the engine,substantially as described.

In testimony whereof I aflix my signature, in presence of two witnesses.

LYMAN O. REED.

Witnesses T. EIsLER, CHARLES HARRIS.

